No the tweaking of the emulator parameters discussed about 14 years ago wasn't satisfactory, with a lot of games not working or still working too fast.
Thanks Cosmos for having updated the code with Piru's modification. It seems to work perfectly on my A4000 with any game i can try now, just like on the A1200.
The solution was so simple, until someone with assembly knowlegde spent some time to do it.
